Wanted to make some improvement to clipping performance of my BJT LTP, BJT VAS, BJT Driver, Lateral FET output amplifier.
Simulating with a 2 Ohm load to get a worst case scenario(my speakers are 8 Ohm dipping to 4 Ohm in the bass area).
Clipping, driving an 2 Ohm load occurs at about 3.7V p-p input, which is about 80 V p-p output.
To take it to the extreme I raised the input to 6 V p-p to get some serious clipping.
Attached is result without any measures to improve clipping performance
Simulating with a 2 Ohm load to get a worst case scenario(my speakers are 8 Ohm dipping to 4 Ohm in the bass area).
Clipping, driving an 2 Ohm load occurs at about 3.7V p-p input, which is about 80 V p-p output.
To take it to the extreme I raised the input to 6 V p-p to get some serious clipping.
Attached is result without any measures to improve clipping performance
Attachments
Ever heard of designing for worst case scenarios?
I think many preamplifiers can output more than 3.7 p-p....
Adding to that, in a real world scenario, when an amp starts to clip continously it will start to sound distorted and unpleasant and people would turn it down.
So 6 V p-p is not realistic at all.
But for short music transients that might make the amp clip on peaks, having some sort of improvement on the clipping performance is a good thing.
"Sticking" on a clipped waveform, even if it just on very short transients peaks, would not sound that good.
The 6 V p-p was just taking it to the extreme.
today with Loudness War levels of compression so common many may no longer recognize clipping - its just the way the "music" already sounds
you can find several anecdotes about amateur DJ or others turning up systems with audiophile levels of reserves until speaker meltdown because the sound wasn't "getting fat" from clipping
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